Hmm... the blending/shading is good, freehand is ok. Is it airbrushed? that would explain why everything is painted the same color, the only elements painted seperately look like the driver and the waystones. Why not have a few other colors on the obvious seperate elements on the weapons/legs? Love the base, subtle and realistic. Why oh, why didn't ya paint the canopy? and the driver's armor looks very flat compared to the other areas.
The pose looks weird as well, maybe its the pic angle but it looks like he's gonna do a faceplant.
It's subtle, but when you let the eye roam you can really appreciate the blending and notice te gread freehand bolts!
I agree though, the canopy really does need to be painted! It's the very first thing I noticed about it :)